Recoding was not carried out.
There is a mix of levels in technical education (code 3), as it could be both low, medium or high.
Also code 7 might be mixed between medium or high (more likely to be high though). 
Since 12 percent of the population is concerned, LIS decided not to recode.

If LIS users want to pursue a recode they may do so on their own responsability.
The mapping below may serve as suggestion. 
The problematic categories are pointed out.

PEDUC							     ISCED97	   LIS recode
  0  no education								1
  1  primary education						1		1
  2  complementary education							1
  3  technical education					2A/3C/5B	1 or 2 or 3 ?
  4  professional education					3C		2
  5  lower secondary education					2A		1
  6  higher secondary education					3A		2
  7  higher non-university education						2 or 3 ?
  8  university							5/6		3